Folding storage box



FIG. 1 is a first perspective view of a folding storage box showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view of the folding storage box shown in another alternate configuration in a folded, open state; and,

FIG. 10 is another perspective view thereof. 

CLAIM The ornamental design for a folding storage box, as shown and described. 